For reference, I'm using Mach3 version R3.043.062.
When I draw a simple circle with the center of the circle at origin at X0, Y0, Z0 and load the G-code to Mach3 on my engraving CNC the center of the circle is no longer at the X0, Y0, Z0 coordinate. I can run the same code on my Tormach which also uses Mach3 and it works correctly. If I draw a square in the same position, it works with no trouble.
I've been using Mach3 for better than 15 years and never run across this before. I even removed and reinstalled Mach3.
I thought about trying a different version of Mach but I'm running a SmoothStepper board and it calls for this version.
Here's a copy of the code:
N1 G00 X0. Y0. Z0.1
N2 Y0.75
N3 G01 Z-0.02F5
N4 G03 I0. J-0.75F30
N5 G00 Z0.1
N6 G00 X0 Y0
I've attached a picture of Mach3, note the origin of the circle in the tool path window.
I'm really stumped on this one.
Any ideas?